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Finding the Fourth Proportional to 438,701.77, 658,076.03 and 139,205.79

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Solution

The fourth proportional to 438,701.77, 658,076.03 and 139,205.79 is: 208,816.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,701.77 : 658,076.03 = 139,205.79 : x
  2. Step 2: Convert to fraction form
    438,701.77/658,076.03 = 139,205.79/x
  3. Step 3: Cross multiply
    438,701.77x = 658,076.03 × 139,205.79
  4. Step 4: Simplify right side
    438,701.77x = 91,607,993,462.21
  5. Step 5: Solve for x
    x = 91,607,993,462.21/438,701.77
  6. Step 6: Final answer
    x = 208,816.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.